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9-4. Changing the Standard Setting
Values (Video Level)
n
To change the standard setting value for Black Level,
Gamma , Manual Knee and White Clip levels by
customer's request, proceed as follows:
9-4-1. Changing Black Level and Gamma
Settings
Black Level and Gamma can be adjusted by the items
M.BLACK and M.GAMMA of the Advanced menu
"PAGE 11".
The following procedure describes how to change
adjustment center value (± 0) from its factory-set value.
Equipment:
Waveform monitor
Preparation:
. Connect the waveform monitor to VIDEO OUT
terminal.
. Perform the switch setting before adjustment.
(Refer to Section 9-1-3.)
. A. IRIS MODE switch (side panel) → STD
1. Black Level change setting
(1) Close (C) the lens iris and perform the black balance
adjustment.
(2) Select SERVICE menu "PAGE17", adjust the
M.BLACK item for the black level A.
M.BLACK Standard value = 2083
Specificafion:
A = 10 IRE (for NTSC)
A = 20 mV (for PAL)
Higher adjustment values set higher black levels and lower
adjustment values set lower black levels.
9-16
2. Gamma Change Setting
(1) Open the lens iris, shoot the grayscale chart fully in the
underscanned monitor frame.
(2) Peform the white balance adjustment, adjust the lens
iris so that the white level becomes 100 IRE (B = 100
IRE).
(3) Select SERVICE menu "PAGE17", adjust the
M.GAMMA item for the cross point C on the
grayscale.
M.GAMMA standard setting value = 132
Change the M.GAMMA value on SERVICE menu
"PAGE17" (Refer to section 4 Setting Menu).
Higher adjustment values set higher gamma coefficient,
that is, the level (C) of the gray scale become higher
compared to at the standard setting value as shown in
Fig.1.
Lower adjustment values make the level (C) lower as
shown in Fig.2.
A
B
C
C
Fig.1
C
Fig.2
DSR-570WS/570WSP V1
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